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The relocation of the Sarina Wastewater Treatment Plant is a significant project that provides better protection of the environment and allows for a more robust wastewater treatment system for the Sarina area.

In order to meet the requirements SPIRAC provided an inlet flow splitter where the the raw sewage passses over a fixed weir into a chamber feeding two fine screen channels. The fixed weir is high above floor level to create an inlet chamber to dissipate the energy of incoming sewage.

The two drumscreen work in a duty/standby configuration to remove solids larger than 2.0 mm in two dimensions from the incoming flow and are connected to SPIRAC screenings conveyor system, for reliable and maintenance-free solids transport. The screenings conveyors transport screenings to the screenings washer/compactor via a drop chute. The SPIROWASH washes out the organics from the screenings and reduces the volume and the weight of the screening and compacts them. The screenings washer/compactor wash and compact the screenings before depositing them into a combined screenings and grit bin.

Screened sewage passes from the fine screen channels to the SPIRAC GRIT VORTEX tank. SPIRAC Grit Vortex unit is designed for separating high density grit particles from lower density organics.The installed grit pump withdraws grit slurry from the grit tank and pumps it to the SPIRAC GRIT WASHER which washes and separates the grit, and transfers it to the combined screenings and grit bin. The SPIRAC Grit Washer makes sure that all visible organics on the grit is removed.

Projected Outcomes

Improved quality of effluent being released to the environment.

Increased system capacity to cater for expected growth and development in the area.

The new system provides significant improvements and is more reliable.

New site has less impact on the Sarina township.

The new treatment plant will be built to cater to a population of 7000 people. The design also allows for further expansion.